Tractor shoe



June @136. J'. c. HAGGART, JR

TRACTOR SHOE Filed Jan 192s woentoq, I W

o l D Patented June 24, 1930 UNITED STATES PATENT OFFICE JOHN C.EAGGART, J'B OF ALMA, MICHIGAN, ASSIGNOR TO REPUBLIC TRUCK SALESCORPORATION, 01 ALMA, MICHIGAN, A CORPORATION OF MICHIGAN 'rnac'ron snonApplication filed January 9, 1928. Serial No. 245,298.

The present invention pertainsto a novel tractor shoe designedparticularly for use in the assembly of the endless or track layingtread members for tractors.

It is an object of the invention to provide a tractor shoe which willprevent the driving thrusts from being transmitted throughmetal-to-metal contacts to the driving shafts or framework and to absorbthese thrusts as near as possible to the ground. In the accomplishmentof this object, the shoe is constructed of upper and lower sections witha resilient pad inserted therebetween. The pad is connectedindependently to the two sections; in other words the securing membersbinding. the pad to one of the sections are not connected to the othersection. In this manner there is provided a yielding or elasticconnection between the lower ground-en aging section and the uppersection of the s 0e, and this form of connection assistsin taking thedriving thrusts. 4

The invention is fully disclosed by way of example in the followingdescription and in the accompanying drawing, in which Figure 1 is a planView of a number of shoes connected together; and

Fig. 2 is a longitudinal section of one of the shoes on the line 2-2 ofFigure 1.

Reference to these views will now be made by use of like characterswhich are employed to designate corresponding parts throughout.

As already indicated, the shoe comprises an upper section 1 and a loweror ground-engagin section 2, between which is interposed a resi ient pad3. At the transverse edges of the upper section are provided rows ofbolts 4 which bind this section to the pad and have their lower endsseated in recesses 5 in the lower section 2. The lower ends of the boltsare fitted with nuts 6 received in the recesses for preventing slippingof the bolts. It will be seen that the nuts are received loosely intheir respective recesses in order to avoid contact of the nut with themetal parts of the shoe, as a result of which there is no interferencewith the resilient action of the pad 3. The bolts 4 are alternated withrecesses 7 formed through the upper section, and these recesses receivethe heads 8 of bolts 9 which pass through the pad 8 and are anchored inthe lower section 2. v

It will now be apparent that the intermediate pad 3 is connectedalternately or inde pendently to the two sections, the binding memberssecuring one of the sections to the pad being entirely free of theremaining section so that there is no rigid or metallic contact betweenthe two sections of the shoe.

The upper section 1 is formed with a marginal rib 10 on its lowersurface for engaging the edge of the inner pad and further holding thesame against slipping. A rib 11 is formed transversely of the lowersection 2, extending upwardly into the bottom of the pad for preventingtoo great a slip between the upper and lower sections and to avoidtaxing the elasticity of the pad 3 and excessive shearing action at thebolts 4 and 9.

The lower member 2 is formed with a tread member 12 in the form of aV-shaped rib on its lower surface. The transverse edges are formed withknuckles 13 for insertion between and alignment with similar knuckles onthe adjacent shoes, whereby the tractor chain may be assembled by pivotbolts 14 passed through such aligned knuckles.

Due to the elastic connection between the ground-engaging section 2 andthe upper section 1, the driving thrusts are somewhat absorbed beforereaching the upper section and other parts of the tractor, ascontemplated in the object of the invention.

Although a specific embodiment of the in vention has been illustratedand described, it will be understood that various alterations in thedetails of construction may be made upper section, a substantially fiatlower secsection, and a transverse rib extending from one of saidsections into the pad.

In testimony whereof I affix my signature.

JOHN G: HAGGART, J R.

